This is a morbid process in which the proper muscular tissue is replaced by little particles of fat. The change in appearance is easily seen by reference to Figs. 334 and 335, in which are shown the healthy muscular fibres and fibres which have undergone fatty degeneration. It occurs in muscles which have long been paralyzed, being the result of their non-use. The occurrence of fatty degeneration in the muscles is one of the results to be guarded against in cases of paralysis. It may be prevented by the daily employment of massage and the use of electricity.

Fig. 334. Healthy Muscular Fibres.

Fig. 334. Healthy Muscular Fibres.

Fig. 335. Fatty Muscular Fibers.

Fig. 335. Fatty Muscular Fibers.